Grinding-machine.



H. A, SGHNELBACHVSL H. A. HEUPBL.

GRINDING MACHINE APPLICATION FILED PEB.' 5. 1803. I

H0 MODEL. 3 SHEETS-SHEET 1.

No. '745.677 l PATENT-BD DBG. 1.19031 H. A. so-HNELBAGH & H. A. HEUPEL.l

GRINDING MACHINE. APPLIOATION PILEDVFE. 5. 1903.

UNITED STATES ifatented ecember fl, 1903.

PATENT OFFICE.

HARRiT A. SCIINELRACH, oE-PITTSBRG, AND HERMAN A. HEUPEL, or CHARLEROI,PENNSYLVANIA, ASSIGNORS To MACBETH EvANS GLASS COMPANY, OE PITTSBURG,PENNSYLVANIA, A CORPORATION OE PENN- SYLVANIA.

cambino-MACHINE.

SPECIFICATION formingpal't 0f LetterslPatent No. 745,677, dated December1, 1903. reputation nea rama-y 5, 1903;. sain No. 142.028. (Nb man.)

,To all whom it may concern.:

Be it known that we, HARRY A. SCHNEL- BAOH, a residentv of Pittsburg, inthe county of Allegheny, and HERMAN A. HEUPEL, a resident of Charleroi,in the county of Washington, State of Pennsylvania, have invented a newand useful Improvement in Grinding- Machines; and we do hereby declarethe-following to be a full, clear, and exact description thereof. A

Our invention relates to apparatus for grinding articles of glassware,and more especially to open-ended articles, such as lampchimneys, whereboth ends are subjected to a finishing operation. K

The object of our invention is to provvide a simple form of apparatus bymeans of which the article to be nished is so held with reference to thegrinding-faces that both ends of the article may be acted upon at thesame time and the article finished without the necessity of reversingits position.

To these ends our invention comprises, gen- Y erally stated, a Suitablerotary holder, with means for holding the article to be nished securelyintermediate of the ends ofsaid article and grinding devices adapted tobe4 brought into contact with the projecting ends of said article, sothat both ends of said article may be acted upon and ground at the sametime. -Y

Our invention further comprises certain other novel features, all ofwhich will be hereinafter fully set forth and claimed.

To enable others skilled in the art to make and use our invention, wewill describe the` same more fully, referring to the accompanyingdrawings, in which- Figure 1 is a side elevation of our improvedgrinding apparatus. Fig. 2 is a plan View of same.v Fig. 3 is anenlarged end view, partly in section. Fig. 4 is an enlarged plan view.Fig. 5 isa section taken on the line 5 5, Fig.

3; and Fig. 6 is a like sectional view showing the device adjusted foran article of shorter Like numerals indicate like paris.

l Y In the drawingsthe numeral 2 designatesa suitable stand or supportfor the machine, and resting on said support is the bed-plate 3. Thestandards Il are bolted to the bedplate 3 by means Yof bolts 5, saidstandards having the bearings 6, in which the shaft 7 is journaled. Adrum 8 is mounted to swing on the shaft 7, Vsaid drum having the journal9 with the opening 10 therein, through which the shaft 7 passes. On theopposite side of Said drum is the arm 11,1adapted to rest upon thesupport 12, secured to the bed-plate 3. A latch-arm 13 is pivoted to thesupport 12 at 14, said latch-arm having the latch 15 adapted to engagethe upper face of the arm 11 and lock said arm rigidly in position. Aspring 16 bears against the rear face of the latch-arm 13, said springpassing down and around the stud 17 and with its free end bearingagainst the stud 18, the tendency of said locking position.

Within the drum .8 is the cylinder 19, said cylinder having upon itsouter surface the' cog 20, by means of which said cylinder is adaptedlto be rotated within the drum 8. The drum 8 has the annular space 21,which provides for the reception of the cog 20. A

being mounted on the shaft 23. Asprocketwheel 24; isv mounted on the,shaft 23, and a sprocket-chain 25 connects said sprocketwheel with thesprocket-wheel 26 on the main power-shaft 27, driven by any suitablepower. ln this mannerpower is transmitted from 'the shaft 27 to thepinion 22 and in turnto the cylinder 19.

The cylinder 19 is internally threaded, as at 28, to receive thethreaded bushing 29 at one end and a like threaded bushing 30 at theother end, said bushings having the milled anges 31 for convenienceinturningsaid'bushings. Thebushings29and 30 are aring or outwardlycurved, as at 32, and have also the shoulders 33. The bushing 29 isadapted to receive the rubber or other yielding bushing 34, which litssnugly within the bushing 29, said rubber bushing having ypinion 22meshes with the cog 20, said pinion Y the shoulder 35, adapted to engagethe shoulder 33 of the bushing 29,while at the same time said rubberbushing 34 projects slightly beyond the bushing 29. The bushing30 isalso adapted to receive the rubber or other yielding bushing 36, adaptedto fit snugly within the bushing 30 and having` the shoulder 37 adaptedto engage the shoulder 33 of the bushing 30. The rubber bushing 36 maybe internally shaped so as to correspond to the contour of the articleto be ground, and where such an article is a lamp-chimney, asillustrated, said bushing is shaped to correspond substantially to therounded surface of the chimney at that portion of said chimney incontact with the bushing. In like manner the bushing 34 is also shapedinternally to correspond to the portion of the article with which itengages, and, as illustrated, is made to conform to the upper ortapering portion of a lamp-chimney.

Mounted on the support 2 at each end of the drum 8 are the bed-plates,movable in suitable guides 38, each carrying the standards 39, withinwhich are mounted the shafts 40. At the ends of the shafts aregrindingwheels 4l, made of any suitable material,and a spring 42,encircling the shaft 40 between the standards, acts to permit of theyielding of the grinding-disks when in operation.

The shaft 40 is journaled at its outer end in a bifurcated standard 43,and within the arms of said standard is the driving-pulley 44, which issplined upon the shaft 40, so that said shaft can move to and froindependent of said pulley.

The bed-plates 38 are mounted, as stated, to slide to and fro upon theframe 2, and extending down from said bed-plates are the lugs 45, towhich the arms 46 and 47 arepivoted. The arm 46 is connected at itsopposite end to the lower end of the rock-arm 48, while the arm 47 isconnected to the upper end of the rocking arm 48, said rock-arm beingpivoted at 49 to the depending bracket 50. The lever 5l is adapted tooperate the rock-arm 48. From this construction it is apparent that bythe operation of the lever 5l the sliding bed-plates 38 may be movedinto position to bring the grinding-disks 4l into contact with the endsof the article to be ground, while the driving-pulleys 44 remain inoperative position in the stationary supports 45, the shafts 40 slidingin said pulleys.

The shafts 40 are hollow shafts and may be connected up by suitablepipes 52 to a water-su pply, said pipes conveying the water to theshafts 40, whence it passes to the opposite ends of said shafts, whereit is sprayed by any suitable means over the grindingfaces of the disks4l, all of which was old prior to our invention and forms no partthereof.

When our improved grinding apparatus is in use, the operator releasesthe drum 8 by pulling back the latch-arm 13 to release the arm 1l,whereupon said drum may be swung over to the position shown in dottedlines in Fig. 3. The operator then turns the bushing 30 to withdraw saidbushing and the rubber bushing 36, in'closed therein. When the bushing30 has been removed, which may be done by one or two turns, the threadsbeing arranged accordingly, the chimney to be ground is inserted withits top portion within the rubber bushing 34 and projecting slightlybeyond the same, whereupon the bushing 30 is inserted and screwed up inposition until the rubber bushing 36 bears against the chimney, whilethe lower end of said chimney projects slightly beyond said rubberbushing. In this manner the chimney isaccurately centered within thecylinder 19 and is securely held in position therein by the bushings,the rubber bushings acting to cushion the chimney and prevent thebreaking of the same, While at the same time said chimney is heldrigidly in -position and accurately centered, so as to present its upperand lower edges to the grinding-wheels in proper position to be groundevenly. The operator after the chimney has been properly adjusted withinthe cylinder 19 throws the drum 8 back intoits normal position, withthearm l1 resting on the support l2, whereupon the latch l5 is brought intoposition to engage said arm 11 and lock the drum securely in position,with the cog 2O in engagement with the pinion 22. The operator thengrasps the lever 5l, and by throwing it in the proper direction bringsthe grinding-disks 4l into contact with both ends of the chimney. Powerhaving been applied to operate the several parts, the chimney is causedto rotate in one direction, While the grinding-disks in contacttherewith are driven in the opposite direction. The grinding-disks areheld in contact with the upper and lower edges of the chimney until theproper grinding action has been obtained and the chimney properlylnished, whereupon the operator throws the lever 51 in the oppositedirection to withdraw the grinding-disks and then releases the drum 8 toforce it over into its inoperative position. The operator can thenquickly remove the bushing 30,with draw the chimney finished, and inserta new one, and repeat the above operation. The chimneys may thus befinished at both ends by one operation, thereby doing away with thenecessity of reversing the chimney to vgrind the opposite end after oneend has been ground, While at the same time the chimney is held atpoints intermediate of its ends, so as to be securely held during thegrinding operation and at the same time relieved of any strain whichwould tend to break the chimney. The chimneys may be accuratelycentered, so as to present their edges evenly to the grinding-disks, andthis centering is done quickly and without any nicety of adjust- -menton the part of the operator, the bushtion in connection with thefinishing of a chimney of shorter length than that represented in Fig.5, in which case it is only necessary to employ a `bushing 53 Without aflange, so that said bushing may be screwed Within the cylinder 19 toany suitable distance, according to the length of the chimney to befinished. The chimney is inserted in the same manner as above described,while the grinding-disk for the upper end ofthe chimney is moved Withinthe cylinder 19 suficientl y to bear against the upper end of saidchimney to perform the grinding operation.

What we claim as ourinvention,and Wish to secure by Letters Patent, is-

1. In glass-grinding apparatus, a positivelydriven rotary cylinder,means for 'supportin g the article to be ground intermediate ofy itsends within said cylinder, and grinding mechanism for finishing the endsof said article.

2. In glass-grindingapparatus, apositivelydriven rotary support for thearticle t0 be ground, and grinding mechanism for finishing both ends ofsaid article at the same time.

3. In glass-grinding apparatus, a frame, a support formed of' yieldingmaterial in said frame adapted to support the article intermediate ofits ends, and grinding mechanism for finishing the ends of said article.

4. In glass -grinding apparatus, a frame, an internally-yielding supportin said frame adapted to support the article to be ground, and grindingmechanism for finishing the end of said article.

5. In glass-grinding apparatus, a frame, an internally-yielding bushingin said frame adapted to support the article to be ground, and grindingmechanism for linishing the end of said article.

6. In glass -grinding apparatus, a frame, yielding bushings in saidframe adapted to encircle the article to be ground at pointsintermediate of its ends, and grinding mechanism for nishing the ends ofsaid article.

7. In glass-grinding apparatus, a frame, a yielding bushing in saidframe adapted to encircle the article to he ground, anadjustable supportfor said bushing, and grinding mechanism for finishing the end of saidarticle.

8. In glass-grinding apparatus, a frame, a yielding bushing adapted toencircle the article to be ground, a rigid bushing in said frame andWithin which said yielding bushing is supported, and grinding mechanismfor iinishing the end ot said article.

10. In glass-grinding apparatus, a frame, a yielding bushing adapted toencircle the article to be ground, a rigid bushing in said frame, saidbushing having a tapering seat adapted to receive said yielding bushing,and grinding mechanism for finishing the end of said article.

ll. In glass-grinding apparatus,.a frame, a yielding bushing adapted toencircle the article to-be ground, a rigid bushing in said frame, saidbushing having a shoulder with Which a shoulder on said yielding bushingengages, and grinding mechanism for nishing the end of said article.

19. In glass-grinding apparatus, a frame, a yielding bushing supportedin said frame adapted to encircle the article to be` ground, saidbushing having a seattherein corresponding substantially to the shape ofthat portion of the article encircled thereby, and grinding mechanismfor finishing the end of said article.

13. In glass-grinding apparatus, a frame, yielding bushings at each endthereof adapted to encircle the article to be ground intermediate ofVits ends, means for removing one of said bushings, and grindingmechanism for finishing the ends of said article.

14. In glass-grinding apparatus, a swinging frame, means for supportingthe article to be ground Within said frame, and grinding devices inposition with reference to said frame to grind both ends of the articlesupported therein.

l5. In glass-grinding apparatus, a swinging frame, means for supportingthe article to be ground within said frame, a locking device for saidframe, and grinding devices in position with referenceto said frame togrind both ends of the article supported therein.

16. In glass-grinding apparatus, the combination With a suitablesupport, of a swinging frame mounted thereon, means for supporting thearticle to be ground Within said frame, a latch-bar on said supportadapted to engage said frame, and grinding. devices in position withreference to said frame to grind both ends of the article'supportedtherein.

17. In glass-grinding apparatus, the combination with a suitablesupport, of a swinging frame mounted thereon, means for supporting thearticle to be ground Within said `frame, a spring-actuated latch-barhaving a latch adapted to engage said frame, and grinding devices inposition with reference to said frame to grind both ends of the articlesupported therein.

1S. In glass-grinding apparatus, the com- Y bination with a suitablesupport, of a drum mounted therein, a rotary cylinder within said drum,means for supporting the article to be ground therein, a cog in saidcylinder, a pinion engaging said cog, mechanismfor driving said pinion,and grinding mechanism adapted to nish the articles to be ground.

19. In glass-grinding apparatus, the com- Y In testimony whereof We, thesaid HARRY 1o bination with a suitable support, of a swing- A.SCHNELBACH and HERMAN A. HEUPEL, ing drum mounted thereon, a rotarycylinder have hereunto set our hands.

Within said drum, means for supporting the i article to be ground Withinsaid cylinder, DILNASIIIACH' mechanism for rotating said cylinder, andgrinding devices in position With reference NVitnesses:

to said drum to grind both ends of the article GEORGE A. MACBETH,

to be ground. ROBERT C. TOTTEN.

